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G.729.1 is an 8-32 kbit/s embedded speech and audio coder providing bitstream interoperability with G.729, G.729 Annex A and G.729 Annex B. This coder has been designed to provide better quality and more flexibility than the existing ITU-T G.729 speech coding standard. G.729.1 is scalable in bit rate, acoustic bandwidth and complexity. In addition it offers various encoder and decoder modes, including the support of both 8 and 16 kHz input/output sampling frequency, compatibility with G.729B, and reduced algorithmic delay. The bitstream of G.729.1 is structured into 12 hierarchical layers. The first layer (or core layer) at 8 kbit/s follows the G.729 format. The second layer (12 kbit/s) is a narrowband enhancement layer. The third layer (14 kbit/s) is a bandwidth extension layer. Further layers (in 2 kbit/s steps) are wideband enhancement layers. The G.729.1 output bandwidth is 50-4000 Hz at 8 and 12 kbit/s, and 50-7000 Hz from 14 to 32 kbit/s. G.729.1 is also known as G.729 Annex J and G.729EV where EV stands for Embedded Variable (bit rate). G.729 From Wikipedia, the free encyclopedia You have new messages (changes). ... The ITU Telecommunication Standardization Sector (ITU-T) coordinates standards for telecommunications on behalf of the International Telecommunication Union (ITU) and is based in Geneva, Switzerland. ... G.729 From Wikipedia, the free encyclopedia You have new messages (changes). ... G.729 From Wikipedia, the free encyclopedia You have new messages (changes). ...
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